Mark

وَلَوْ نَشَآءُ لَأَرَيْنَـٰكَهُمْ فَلَعَرَفْتَهُم بِسِيمَـٰهُمْ ۚ وَلَتَعْرِفَنَّهُمْ فِى لَحْنِ ٱلْقَوْلِ ۚ وَٱللَّهُ يَعْلَمُ أَعْمَـٰلَكُمْ

We could even point them out to you [Prophet] if We wished, and then you could identify them by their marks, but you will know them anyway by the tone of their speech. God knows everything you [people] do.

يُعْرَفُ ٱلْمُجْرِمُونَ بِسِيمَـٰهُمْ فَيُؤْخَذُ بِٱلنَّوَٰصِى وَٱلْأَقْدَامِ

The guilty will be known by their mark and will be seized by their foreheads and their feet.